According to a Eurogamer hands-on session with the PSP-3000, which is scheduled for a worldwide release next week, the unit comes with firmware 4.20 preloaded. The updated system software revision includes a "USB Auto-Connect" option, which automatically begins charging the PSP within the XMB when a USB cable is inserted. Elsewhere, a "Color Space" setting has added to the firmware. When activated, it allows users to take advantage of the enhanced LCD screen found in the PSP-3000 to display more vivid colors.
Interestingly, the hardware ships with a smaller AC adapter unit - one that does away with the black box power pack and actually can fit in your pocket.